[SOLVED] What is Clock Stretch Amount?

PrinceTexasLoaf

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Hello, I have an RX580 8GB and in the bios there is something called "Clock Stretch Amount" and it is set to two what exactly is this and how does it work? And if I were to increase or decrease the number would I get better performance. Also what happens if I set the PWM % for the gpu above 100% would the fans actually spin faster? Cause it does let me set it above 100 but I'm just too scared to do it lol.
 

TJ Hooker

Glorious
Herald
Glad it worked out for you. But as I said, you probably could have just used a software utility like AMD Wattman or MSI Afterburner to achieve the same overclock, without having to resort to BIOS modding (which generally carries a bit more risk, i.e. ending up with a bricked card).

I am quite confident that clock stretch is not any form of OC. Appears to be some sort of power saving feature. https://lists.freedesktop.org/archives/amd-gfx/2016-June/000098.html
 

TJ Hooker

Glorious
Herald
Are you trying to mod your BIOS? What exactly are you hoping to accomplish?

If you're trying to overclock, you typically only need to resort to BIOS mods for extreme OCs. No idea what clock stretch is.

No, setting the fan above 100% will not make it run any faster.
 

PrinceTexasLoaf

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Are you trying to mod your BIOS? What exactly are you hoping to accomplish?

If you're trying to overclock, you typically only need to resort to BIOS mods for extreme OCs. No idea what clock stretch is.

No, setting the fan above 100% will not make it run any faster.
I just copied off a bios that had my same memory and stuff like that from another rx 580
to get a nice stable oc so my coree is 1433 mhz and memory is 2100 mhz and its stable well it doesn't seem unstable I have a toasty card so I can never stress it for too long but on my games it runs well
I wonder if clockstretch is some kind of auto oc in it's own way cause i can't find any info on it
I might just call amd and ask them. and the new bios along with the timings makes my card real fast and fixed my artifact issues here is the benchmark https://www.userbenchmark.com/UserRun/21906164 cause I used to get artifacts when on chrome its honeestly hard to tell why cause I'm pretty sure it happened without oc
the highest score I could get on my RX580 was 62.9% but that was unstable unless I wanted to give it dumb amounts of power
 
Last edited:

TJ Hooker

Glorious
Herald
Glad it worked out for you. But as I said, you probably could have just used a software utility like AMD Wattman or MSI Afterburner to achieve the same overclock, without having to resort to BIOS modding (which generally carries a bit more risk, i.e. ending up with a bricked card).

I am quite confident that clock stretch is not any form of OC. Appears to be some sort of power saving feature. https://lists.freedesktop.org/archives/amd-gfx/2016-June/000098.html
 

PrinceTexasLoaf

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how I did it was I switched to normal bios with the switch then went to polaris bios editor made new bios then used ati flash launched it selected the bios file then switched to bricked bios and programmed it then restarted and it was fixed
 

PrinceTexasLoaf

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Sep 28, 2018
363
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Glad it worked out for you. But as I said, you probably could have just used a software utility like AMD Wattman or MSI Afterburner to achieve the same overclock, without having to resort to BIOS modding (which generally carries a bit more risk, i.e. ending up with a bricked card).

I am quite confident that clock stretch is not any form of OC. Appears to be some sort of power saving feature. https://lists.freedesktop.org/archives/amd-gfx/2016-June/000098.html
so what If I changed it from 2 to 3 it would just be more efficient correct?
 

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